Then it is even more frustrating to find that the plugin has not subsequently been updated to accommodate the changes; that is, the revised version has not yet been released.
Worse still, is finding out that your website crashes immediately after an update. This is usually a rarity but it can happen.
But there is always help at hand, somewhere on the net, to get you out of trouble.
Look for the Fix
As soon as you have an error, copy that error message and paste it into your favourite search engine appended by the word “fix” or “solution” or “solved”.
This will invariably trigger a number of posts and/or forum entries written by people who have encountered the same issue. And with enough searching, you can usually locate an expert who has come up with the perfect solution or workaround.
Plugin Conflicts After Upgrading WordPress
If your site is working okay but you find that your favourite plugin has failed, then you can either wait for the plugin author to update his code or be proactive and look for a solution. I prefer the latter.
Here is an example:
The Sharebar Plugin
This plugin had a conflict after an earlier version update of WordPress.
After the update to WordPress 3.5 this plugin resulted in lines of code appearing at the top of posts (on those that displayed the Sharebar).
Bloggers at the time were helped out by a simple fix provided in How to Fic the Sharebar Plugin Issue after Upgrading to WordPress 3.5 . Thanks to the author of this post for providing a very handy WordPress fix.
Remember, before doing any updates, you need to backup your WordPress blog or site. You can get help with this from my post on WordPress Backups.
Best Safeguard for WordPress Updates
Your best safeguard, to avoid possible problems encountered when updating WordPress versions, is to test them first on a local installation of WordPress. I have installed XAMPP and have at all times, a copy of my live site on localhost. This generates a far greater sense of security when updating as well as when trying out new WordPress themes or major changes to your site.
If you are looking for some more help with your WordPress in general, then here is a course (affiliate link) that has been very, very popular with people who have taken it.